Electric warp stop-motion for looms



. R. J. MOMMERS. ELEGTRIG WARP STOP MOTION FOR LOOMS.

No. 583,214. Patented May 25, 1897.

UNITED STATES PATENT OFFICE.

RICHARD J MOMMERS, OF MANCHESTER, CONNECTICUT, ASSIGNOR TO GEORGE DRAPERdz SONS, OF HOPEDALE, MASSACHUSETTS.

ELECTRIC WARP STOP-MOTION FOR LOOlVlS.

SPECIFICATION forming part of Letters Patent No. 583,214, dated May 25,1897.

7 Application filed August 31, 1896- Serial Not 604,379. (No model.)

To all whom it may concern:

Be it known that I, RICHARD J. MOMMERS, of South Manchester, in thecounty of Hartford and State of Connecticut, have invented anImprovementin Electric Varp Stop-Motions for Looms, of which thefollowing description, in connection With the accompanying drawings, isa specification, like letters and figures on the drawings representinglike parts.

This invention, relatingto looms, has for its object to provide a warpstop-motion which when a warp-thread breaks willpermita metallic dropdevice having a warp-eye and a slot to fall and effect the closing of anelectric circuit, the closing of the circuit causing an electromagnet,carried, preferably, by a knock-off lever, to put alever or finger,preferably pivoted and forming the armature of the said magnet, inposition to be struck by a hammer actuated continuously by a suitablecam or device on a cross-shaft of the loom, the blow of the hammercausing the knock-off device or lever to be moved and push the usualshipper-handle out of its usual holding-notch.

The particular features in which my invention consist will behereinafter described, and pointed out in the claims.

Figure 1 shows a sufficient portion of a loom with my improvement addedto enable my invention to be understood. Fig. 2 is a partial frontelevation of the left-hand end of the loom, showing part of the usualshipper-handle and the knock-off device or lever; and Fig. 3, a top viewof the parts shown in Fig. 2. i

The loom-frame A, breast-beam A, whiproll A under shaft A crank-shaft A,lay A cam A on under shaft, rock-shaft B, and a hammer B andlay-connecting rods B harness-frames a, having harnesses a, and theshipper-handle B adapted to be moved in a slot C in plate C, one side ofsaid slot having a notch to receive the said shipper-handle and hold itin place to keep the usual drivingbelt on the usual driving-pulley, (notshown,) are and may be all as common in looms now in general use, soneed not herein be further described, and it will be understood that theharness-frames in practice will be operated in usual manner.

I desire to stop the loom on the breaking of a warp-thread, and to dothis I have provided a series of flat ribbon-like drop devices I), eachhaving awarp-eye b to receive a Warpthread, and at one side of said eyea slot 19 through which is extended a metallic bar 11 said bar acting tokeep the said drop devices substantially parallel and to also act as aguide for a series of said devices. Belowthe lower ends of thesedrop'devices I have arranged closure devices to cooperate with thedropped lower ends of said drop devices to close an electric circuit,move the armature, and effect the stopping of the loom.

The slot 12 in the drop device and the bar 6 determine the position ofthe drop device when it falls, due to the breaking of a warpthread, andopposite the position occupied by the lower end of a drop device I haveplaced two bars 7t 7f, the bar h being shown as stationary with relationto the loom-frame and provided at its inner face next to the metallicdrop device with a metallic bar 7t, ar-

ranged in and forming part of the electric circuit with the magnet, theother bar 7L2 being made movable toward and from the bar it, onemovement for each shed, so that should a drop device fall its lower endwill be acted upon and forced firmly against the bar h, thus closing theelectric circuit.

The electric circuit may be traced as follows: Starting at one pole ofthe magnet 20, a Wire 21 leads to the battery 22, and a wire 23 from thebattery leads to the metallic bar 72, and from the opposite pole of themagnet I arrange a Wire 24, which goes to the metallic bar 12 in theslot Z9 of the drop-lever. The magnet 20 is located at or near the endof a knock-off device or lever c and lying close to the shipper-handlepivoted at e, said lever carrying the pivoted armature e for the saidmagnet, the outer end of said armature being the heaviest, so that it inits normal position presents its inner end out of the range of movementof the constantly-operating hammer or magnet-actuator B.

The hammer or actuator Bis herein shown as an arm attached to a rockingshaft or stud B and a second arm 13*, extended backwardly over and so asto be actuated by a suitable cam A on the lower shaft A When theelectric circuit is closed through the dropping of a drop device and themovement of the bar 7L2, the electromagnet attracts its armature andputs its inner end into its abnormal position, where it is immediatelystruck by the hammer B, thus moving the knock-off lever and causing itto act against the shipper-handle and push it from its usualholding-notch and effect in usual manner the stopping of the loom.

A drop device maybe dropped by the slacking or by the breaking of itswarp-thread.

The bar 72, is carried by suitable lever-arms 7L3, mounted on arock-shaft 7L4, the arms h" being moved by a yielding pressure, so as toavoid breaking of parts by a spring k resting on a lever 7L6, mountedloosely on said shaft h and actuated by a suitable cam 71.7.

This invention is not limited to the particular means shown for movingthe bar 7L2, and instead I may use any other suitable wellknown device.

By the term shipper-handle I mean to include any usual device which willkeep the driving power of the loom effective to rotate the main shaft ofthe loom.

The screw n is employed as an up-stop for the magnet.

I intend that the term eye shall include any shape, open or closed, bywhich the drop device may be suspended from a warp-thread.

Having described my invention, what I claim, and desire to secure byLetters Patent, 1s

1. In a warp stop-motion for looms, the followinginstrumentalities, viz:a series of metallic drop devices having eyes to hang on thewarp-threads, a shipper-handle to control the application of the drivingpower to the loom, a knock-off device or lever, an armature mounted onit, an electric circuit containing a magnet, a hammer ormagnet-actuator, and a closure device for said circuit, it consisting oftwo bars, one of which is in said circuit, while the other is mademovable to press a dropped drop device firmly against the said bar insaid circuit to close the same, and

means to actuate said bar, substantially as described.

2. In a warp stop-motion for looms, the following instrumentalities,viz: a series of metallic drop devices having eyes to hang on thewarp-threads, and having elongated slots next said eyes, a metallic barby which said drop devices are guided, a shipper-handle to control theapplication of the driving power to the loom, a knock-cit device orlever, an armature mounted on it, an electric circuit containing amagnet, a hammer or magnet-actuator, and a closure device for saidcircuit, it consisting of two bars, one of which is in said circuitwhile the other is made movable to press a dropped drop device firmlyagainst the said bar in said circuit to close the same, and means toactuate said bar, substantially as described.

3. In a warp stop-motion for looms, a drop device freely suspended froma warp-thread, stopping mechanism for the loom, an electric circuitincluding said drop device and said stopping mechanism, two bars, one ofwhich is in said circuit, one of said bars being movable toward theother bar to press the dropped drop device between the two bars therebyto complete the circuit and operate said stopping mechanism, and meansto operate said movable bar, substantially as described.

4. In awarp stop-motion for looms, a drop device freelysuspended from awarp-thread, stopping mechanism for the loom, an electric circuitincluding said drop device and said stopping mechanism, two bars, one ofwhich is in said circuit, one of said bars being yieldingly movabletoward the other bar to press the dropped drop device between the twobars thereby to complete the circuit and operate said stoppingmechanism, and means to operate said movable bar, substantially asdescribed.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

RICHARD J. MOMMERS.

\Vit-n esses:

XVILLIAM H. COATES, ANNETTA McClrw.

